**SEO (Search Engine Optimization)** and **SEM (Search Engine Marketing)** are both crucial for improving a website's visibility and reach. SEO focuses on optimizing a website to rank higher in organic search results, while SEM involves paid advertising to appear in search engine results.
By incorporating **relevant keywords** and **semantic keywords** in the HTML code, you can help both readers and search engines understand the topic better. Utilizing **structured data** and **rich snippets** can also enhance the appearance of search listings, making them more attractive and useful to users.
When creating content, it's important to include **useful and relevant information** in the HTML code to assist search engines in understanding the page's content. Additionally, utilizing **backlinks** from authoritative websites and creating **high-quality content** are essential for both SEO and SEM success.